[IMP] base: Vietnam Dong should have 1.00 as rounding.

No decimal part in Vietnam Dong (đ - Việt Nam Đồng)

closes odoo/odoo#29650

odoo/addons/base/res/res_currency_data.xml

@@ -158,7 +158,7 @@
         <record id="VND" model="res.currency">
             <field name="name">VND</field>
             <field name="symbol">₫</field>
-            <field name="rounding">0.01</field>
+            <field name="rounding">1.00</field>
             <field name="active" eval="False"/>
         </record>